package com.example.onlinemusic.controller;

import com.example.onlinemusic.mapper.LoveMusicMapper;
import com.example.onlinemusic.mapper.MusicMapper;
import com.example.onlinemusic.model.Music;
import com.example.onlinemusic.model.User;
import com.example.onlinemusic.tools.Constant;
import com.example.onlinemusic.tools.ResponseBodyMessage;
import org.apache.ibatis.binding.BindingException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;

@RestController
@RequestMapping("/music")
public class MusicController {

    @Value("${music.local.path}")
    private String SAVE_PATH;

    @Autowired
    private MusicMapper musicMapper;

    @Autowired
    private LoveMusicMapper loveMusicMapper;

    @RequestMapping("/upload")
    public ResponseBodyMessage<Boolean> insertMusic(@RequestParam String singer, @RequestParam("filename") MultipartFile file,
                                                    HttpServletRequest request, HttpServletResponse resp) throws IOException{
        //1.检查是否登录
        HttpSession httpSession = request.getSession(false);
        if (httpSession == null || httpSession.getAttribute(Constant.USERINFO_SESSION_KEY) == null) {
            System.out.println("没有登录");
            return new ResponseBodyMessage<>(-1, "请登录后上传", false);
        }
        //2.上传到服务器
        String fileNameAndType = file.getOriginalFilename();//xxx.mp3
        System.out.println("fileNameAndType:" + fileNameAndType);

        String path = SAVE_PATH + "/" + fileNameAndType;
        File dest = new File(path);
        if (!dest.exists()) {
            dest.mkdir();
        }
        try {
            file.transferTo(dest);
            //return new ResponseBodyMessage<>(0,"上传成功",true);
        } catch (IOException e) {
            e.printStackTrace();
            return new ResponseBodyMessage<>(-1, "服务器上传失败", false);

        }

        //return new ResponseBodyMessage<>(-1,"上传失败",false);

        // 进行数据库上传
        //1. 准备数据   //2.调用insert
        int index = fileNameAndType.lastIndexOf(".");
        String title = fileNameAndType.substring(0, index);//获取title

        User user = (User) httpSession.getAttribute(Constant.USERINFO_SESSION_KEY);
        int userid = user.getId();//获取userid
        String url = "/music/get?path=" + title;//获取url

        SimpleDateFormat sf = new SimpleDateFormat("yyyy-MM-dd");
        String time = sf.format(new Date());//获取time

        try {
            int ret = 0;
            ret = musicMapper.insert(title, singer, time, url, userid);
            if (ret == 1) {
                //跳转到音乐列表页
                resp.sendRedirect("/list.html");
                return new ResponseBodyMessage<>(0, "数据库上传成功", true);
            } else {
                return new ResponseBodyMessage<>(-1, "数据库上传失败", false);
            }
        } catch (BindingException e) {
            dest.delete();
            return new ResponseBodyMessage<>(-1, "数据库上传失败", false);

        }
    }

    @RequestMapping("/get")
    public ResponseEntity<byte[]> get(String path) {
        File file = new File(SAVE_PATH + "/" + path);
        byte[] a = null;
        try {
            a = Files.readAllBytes(file.toPath());
            if (a == null) {
                return ResponseEntity.badRequest().build();
            }
            return ResponseEntity.ok(a);
        } catch (IOException e) {
            e.printStackTrace();
        }
        return ResponseEntity.badRequest().build();
        //return ResponseEntity.internalServerError().build();
        //return ResponseEntity.notFound().build();
        //return ResponseEntity.ok(a);
    }

    //删除单个音乐
    @RequestMapping("/delete")
    public ResponseBodyMessage<Boolean> deleteMusicById(@RequestParam String id) {
        // 1. 先检查这个音乐是不是存在
        int iid = Integer.parseInt(id);
        //2.如果存在要进行删除
        Music music = musicMapper.findMusicById(iid);
        if (music == null) {
            System.out.println("没有这个id的音乐");
            return new ResponseBodyMessage<>(-1, "没有要删除的音乐", false);
        } else {
            // 2.1删除数据库
            int ret = musicMapper.deleteMusicById(iid);
            if (ret == 1) {
                //2.2 删除服务器上的数据
                int index = music.getUrl().lastIndexOf("=");//得到了等号的下标
                String fileName = music.getUrl().substring(index + 1);
                File file = new File(SAVE_PATH + "/" + fileName + ".mp3");
                System.out.println("当前的路径：" + file.getPath());
                if (file.delete()) {
                    //同步删除lovemusic表中的数据
                    loveMusicMapper.deleteLoveMusicByMusicId(iid);
                    return new ResponseBodyMessage<>(0, "服务器中的音乐删除成功", true);
                } else {
                    return new ResponseBodyMessage<>(-1, "服务器中的音乐删除失败", false);
                }
            } else {
                return new ResponseBodyMessage<>(-1, "数据库中的音乐没有删除成功", false);
            }
        }
    }


    //批量进行删除
    @RequestMapping("/deleteSel")
    public ResponseBodyMessage<Boolean> deleteSelMusic(@RequestParam("id[]") List<Integer> id) {

        int sum = 0;
        for (int i = 0; i < id.size(); i++) {
            int musicId=id.get(i);
            Music music = musicMapper.findMusicById(musicId);
            if (music == null) {
                System.out.println("没有这个id的音乐");
                return new ResponseBodyMessage<>(-1, "没有要删除的音乐", false);
            } else {
                int ret = musicMapper.deleteMusicById(musicId);
                if (ret == 1) {
                    //2.2 删除服务器上的数据
                    int index = music.getUrl().lastIndexOf("=");//得到了等号的下标
                    String fileName = music.getUrl().substring(index + 1);
                    File file = new File(SAVE_PATH + "/" + fileName + ".mp3");
                    if (file.delete()) {
                        //同步删除lovemusic表中的数据
                        loveMusicMapper.deleteLoveMusicByMusicId(musicId);
                        sum += ret;
                        // return new ResponseBodyMessage<>(0,"服务器中的音乐删除成功",true);
                    } else {
                        return new ResponseBodyMessage<>(-1, "服务器中的音乐删除失败", false);
                    }
                } else {
                    return new ResponseBodyMessage<>(-1, "数据库中的音乐删除失败", false);
                }

            }
        }
        if (sum == id.size()) {
            System.out.println("整体删除成功");
            return new ResponseBodyMessage<>(0, "音乐删除成功", true);
        } else {
            System.out.println("整体删除失败");
            return new ResponseBodyMessage<>(-1, "音乐删除失败", false);
        }
    }

    @RequestMapping("/findmusic")
    public ResponseBodyMessage<List<Music>> findMusic(@RequestParam(required = false) String musicName){
        List<Music> musicList=null;
        if(musicName!=null){
            musicList=musicMapper.findMusicByName(musicName);
        }else{
            //musicName为空，查询所有的音乐
            musicList=musicMapper.findMusic();
        }
        return new ResponseBodyMessage<>(0,"查询到了所有的音乐",musicList);
    }
}


















